Reference Guide

314 | GARP VLAN Registration Protocol (GVRP)
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Figure 15-3. Enabling GVRP Globally
Enabling GVRP on a Layer 2 Interface
Enable GVRP on a Layer 2 interface using the command gvrp enable in INTERFACE mode, as shown in
Figure 15-4. Use
show config from the INTERFACE mode to inspect the interface configuration, as shown
in Figure 15-4, or use the
show gvrp interface command in EXEC or EXEC Privilege mode.
Figure 15-4. Enabling GVRP on a Layer 2 Interface
Configuring GVRP Registration
• Fixed Registration Mode: Configuring a port in fixed registration mode allows for manual creation
and registration of VLANs, prevents VLAN de-registration, and registers all VLANs known on other
ports on the port. For example, if an interface is statically configured via the CLI to belong to a VLAN,
it should not be un-configured when it receives a Leave PDU. So, the registration mode on that
interface is FIXED.
• Forbidden Mode: Disables the port to dynamically register VLANs, and to propagate VLAN
information except information about VLAN 1. A port with forbidden registration type thus allows
only VLAN 1 to pass through even though the PDU carries information for more VLANs. So, set the
interface to the registration mode of FORBIDDEN if you do not want the interface to advertise or learn
about particular VLANS.
FTOS(conf)#protocol gvrp
FTOS(config-gvrp)#no disable
FTOS(config-gvrp)#show config
!
protocol gvrp
no disable
FTOS(config-gvrp)#
FTOS(conf-if-gi-1/21)#switchport
FTOS(conf-if-gi-1/21)#gvrp enable
FTOS(conf-if-gi-1/21)#no shutdown
FTOS(conf-if-gi-1/21)#show config
!
interface GigabitEthernet 1/21
no ip address
switchport
gvrp enable
no shutdown